What does it mean to have a "clear conscience"? It takes a lifetime to distill the meaning of this tranquility. From the years I have lived, I gradually gather the elements for a final conclusion, replacing some, searching for others, more appropriate. I propose a temporary formula. A peaceful conscience is possessed by someone who can say: "I take what is due to me". "I take responsibility for any damages I may have caused". "What I acquire for my happiness does not detract from the happiness of others".